US8008829B2 - Armature for a rotating electrical machine - Google Patents

Armature for a rotating electrical machine Download PDF

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US8008829B2
US8008829B2 US12/362,090 US36209009A US8008829B2 US 8008829 B2 US8008829 B2 US 8008829B2 US 36209009 A US36209009 A US 36209009A US 8008829 B2 US8008829 B2 US 8008829B2
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phase
coil pieces
parallel circuits
positions
pieces
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US20090195105A1 (en
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Tadashi Tokumasu
Masafumi Fujita
Takashi Ueda
Mikio Kakiuchi
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Toshiba Corp
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Toshiba Corp
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings

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  • the present invention relates to an armature having an armature winding with four parallel circuits, which is applied to a rotating electrical machine having 84 three-phase two-pole slots.
  • an armature winding is provided in two layers in slots with upper coil pieces and lower coil pieces provided in a laminated core, and the two layers of armature winding are connected in series to provide a high voltage, thereby increasing an apparatus capacity.
  • the thickness of a main insulator of the armature winding needs to be increased to withstand the voltage.
  • the cross-sectional area of a conductor of the armature winding is decreased. This increases a current density and loss.
  • a thick main insulator increases thermal resistance and temperature of an armature winding. Therefore, an armature winding is divided into two or more parallel circuits to decrease in voltage and main insulator thickness, while keeping an apparatus capacity, thereby increasing a cooling capacity with decreased loss.
  • an indirect cooling large-capacity machine it is common to increase the number of slots to increase the peripheral length of an armature winding to be cooled. Therefore, it is necessary to use an armature winding having three or more parallel circuits.
  • a phase belt mentioned here means a winding part, which forms the same phase by dividing each of three phases into a plurality of parts, housing upper and lower coil pieces in two layers into slots provided in an assigned armature core, and sequentially connecting them in series.
  • FIG. 7 is a developed perspective view showing one phase of an example of an armature winding having four parallel circuits applicable to a rotating electrical machine having 72 three-phase two-pole slots, based on U.S. Pat. No. 2,778,962 (hereinafter, called a Taylor patent).
  • FIG. 7 shows a part for only one phase. It is however appreciated that parts for the other two phases are obtained by displacing the configuration of the armature winding of FIG. 7 by 120° and 240° (electric angle), respectively, and an illustration thereof is omitted.
  • an armature 11 comprises an armature core 12 , and an armature winding 14 housed in slots 13 provided in the armature core 12 .
  • connection conductors 21 lead-out ends of corresponding parallel circuits are connected between the first and second phase belts 17 and 18 , by connection conductors 21 .
  • An armature winding having four parallel circuits is mechanically complex. Namely, as shown in FIG. 7 , for making an armature winding, it is necessary to provide fourteen jumper wires 20 a per phase at the connection-side coil end 19 a , for connecting upper coil pieces 15 and lower coil pieces 16 . Connection of the jumper wires 20 a requires much time and labor, and it is important to ensure the insulation and fixing strength of the jumper wires 20 a.
  • connection side jumper wires 20 a are connected in a short distance, the jumper wire connection work is uneasy, and it is difficult to ensure the insulation and fixing strength of the jumper wire, due to the interference between the jumper wires 20 a , and between the jumper wires 20 a and lead-out connection conductors 21 .
  • an object of the present invention to provide an armature having an armature winding with four parallel circuits, applied to a rotating electrical machine having 84 three-phase two-pole slots, in which a voltage imbalance among parallel circuits is decreased, and a circulating current loss among parallel circuits is decreased, and a jumper wire connection work for forming an armature winding is decreased, insulation and fixing strength of jumper wires are easily ensured.
  • an armature comprising: an armature core with slots; and an armature winding that is housed in the slots, wound in two layers, and provided with fourteen coil pieces per pole and phase, each phase of the armature winding divided into two phase belts per pole, each phase belt having two parallel circuits, each parallel circuit having a serial coil, each serial coil having upper coil pieces and lower coil pieces connected to each other at a connection-side coil end and a counter-connection side coil end, the upper and lower coil pieces in one half of the parallel circuits being located at the 1st, 4th, 6th, 7th, 9th, 12th and 14th positions, and the upper and lower coil pieces in remaining half of the parallel circuits being located at the 2nd, 3rd, 5th, 8th, 10th, 11th and 13th positions, when relative positions of the upper and lower coil pieces in each phase belt are indicated by positions counted in a direction separating away from a pole center.
  • FIG. 1 is a developed perspective view showing one phase of an armature winding of a rotating electrical machine according to a first embodiment of the present invention
  • FIG. 2 is a developed perspective view showing one phase of an armature winding of a rotating electrical machine according to a second embodiment of the invention
  • FIG. 3 is a developed perspective view showing one phase of an armature winding of a rotating electrical machine according to a third embodiment of the invention.
  • FIG. 4 is a developed perspective view of a modification of the armature winding of the rotating electrical machine according to the same embodiment
  • FIG. 5 is a developed perspective view showing one phase of an armature winding of a rotating electrical machine according to a fourth embodiment of the invention.
  • FIG. 6 is a developed perspective view of a modification of the armature winding of the rotating electrical machine according to the same embodiment.
  • FIG. 7 is a developed perspective view of an example of a conventional armature winding of a rotating electrical machine.
  • FIG. 1 is a developed perspective view showing one phase of an armature winding of a rotating electrical machine according to a first embodiment of the present invention.
  • An armature 11 has 84 slots 13 in an armature core 12 consisting of a laminated core.
  • a two-pole three-phase armature winding 14 having four parallel circuits is provided in two layers in the slots 13 .
  • the armature winding 14 of each phase has upper coil pieces 15 ( 15 a , 15 b ) housed in the upper part of the slots 13 , and lower coil pieces 16 ( 16 a , 16 b ) housed in the lower part of the slots 13 .
  • the end portions of these upper and lower coil pieces 15 and 16 are connected in series at a connection-side coil end 19 a , and at a counter-connection side coil end 19 b that is opposite to the connection-side coil end in the axial direction and not connected to a winding lead-out portion.
  • the armature winding 14 also has a first phase belt 17 which houses the upper and lower coil pieces 15 a and 16 a in fourteen slots 13 provided in the armature core 12 , and a second phase belt 18 which houses the upper and lower coil pieces 15 b and 16 b in fourteen slots 13 .
  • the armature winding 14 of each phase has four parallel circuits.
  • the parallel circuits are identified by parenthetic numbers 1 , 2 , 3 and 4 as shown in the drawing.
  • circuit numbers are merely signs to identify the circuits. Any signs may be assigned to the circuits in any order.
  • the upper coil pieces 15 in each of the phase belts 17 and 18 are connected to the corresponding lower coil pieces 16 separated by a fixed coil pitch, at the connection-side coil end 19 a and counter-connection side coil end 19 b , thereby forming four parallel circuits 1 , 2 , 3 and 4 .
  • the parallel circuits 1 , 2 , 3 and 4 are connected in parallel through the lead-out conductor 21 provided at the connection-side coil end 19 a , thereby forming the armature winding 14 .
  • FIG. 1 shows an example adopting a small coil pitch of 2 ⁇ 3. This is just for making the drawing easy to see. A coil pitch is not limited to this value.
  • Seven upper and lower coil pieces 15 and 16 in each of the first and third parallel circuits are located at the 1st, 4th, 6th, 7th, 9th, 12th and 14th positions from a pole center Pa (Pb), and seven upper and lower coil pieces 15 and 16 in each of the second and fourth parallel circuits are located at the 2nd, 3rd, 5th, 8th, 10th, 11th and 13th positions from a pole center Pa (Pb).
  • the circuits of the upper and lower coil pieces 15 a and 16 a in the first phase belt 17 are numbered 1, 2, 2, 1, 2, 1, 1, 2, 1, 2, 2, 1, 2 and 1 sequentially from a pole center Pa
  • the circuits of the upper and lower coil pieces 15 b and 16 b in the second phase belt 18 are numbered 3, 4, 4, 3, 4, 3, 3, 4, 3, 4, 4, 4, 3, 4 and 3 sequentially from a pole center Pb.
  • the p. u. indication of the voltage in only one of the parallel circuits in one phase is a ratio between an open-circuit voltage of that parallel circuit and an average voltage (a phase voltage) of the whole phase. This indicates the degree of imbalance between the open-circuit voltage of that parallel circuit and whole phase voltage.
  • a phase angle deviation in an open-circuit voltage and a phase voltage generated in one parallel circuit indicates the degree of imbalance between the phase angles of that parallel circuit and whole phase.
  • Table 2 shows the balance among the voltages generated in the armature winding according to the first embodiment of the invention.
  • Table 2 shows the case where a coil pitch is 35/42(83.33%).
  • a voltage deviation (deviation from 1.0 of the p. u. voltage) is 0.18% maximum, and a phase angle deviation is 0.0°, which are a little lower than the imbalance in the Taylor patent, but satisfy the reference voltage deviation of 0.4% and reference phase angle deviation of 0.15° or lower in the Habermann patent.
  • Table 3 shows the maximum values of voltage deviation and phase angle deviation changed by a coil pitch in the first embodiment of the invention.
  • the balance within a practical coil pitch range satisfies the reference voltage deviation of 0.4% and reference phase angle deviation of 0.15° or lower in the Habermann patent.
  • the total number of jumper wires 20 b is decreased from twelve per phase in the first embodiment of the invention.
  • the jumper wires 20 b are provided at the counter-connection side coil end 19 b , and not causing interference with the lead-out conductor 21 . This improves the workability of connecting the jumper wires 20 b , ensures the insulation and fixing strength of the connection part without difficulty, and provides a reliable armature winding.
  • the embodiment is not limited to the configuration shown in the drawing. The same effect can be obtained also by changing the lead-out position, and replacing the coil pieces placed at the electrically equivalent positions in the parallel circuits 1 and 3 .
  • FIG. 2 is a developed perspective view showing one phase of an armature winding of a rotating electrical machine according to a second embodiment of the invention.
  • An armature 11 has 84 slots 13 in an armature core 12 consisting of a laminated core.
  • a two-pole three-phase armature winding 14 having four parallel circuits is provided in two layers in the slots 13 .
  • the armature winding 14 of each phase has upper coil pieces 15 ( 15 a , 15 b ) housed in the upper part of the slots 13 , and lower coil pieces 16 ( 16 a , 16 b ) housed in the lower part of the slots 13 .
  • the end portions of these upper and lower coil pieces 15 and 16 are connected in series at a connection-side coil end 19 a that is connected to a winding lead-out portion, and at a counter-connection side coil end 19 b that is opposite to the connection side coil end in the axial direction and not connected to a winding lead-out portion.
  • the armature winding 14 also has a first phase belt 17 which houses the upper and lower coil pieces 15 a and 16 a in fourteen slots 13 provided in the armature core 12 , and a second phase belt 18 which houses the upper and lower coil pieces 15 b and 16 b in the fourteen slots 13 .
  • the armature winding 14 of each phase has four parallel circuits.
  • the parallel circuits are identified by parenthetic numbers 1 , 2 , 3 and 4 as shown in the drawing.
  • the upper coil pieces 15 in each of the phase belts 17 and 18 are connected to the corresponding lower coil pieces 16 separated by a fixed coil pitch, at the connection-side coil end 19 a and counter-connection side coil end 19 b , thereby forming four parallel circuits 1 , 2 , 3 and 4 .
  • the parallel circuits 1 , 2 , 3 and 4 are connected in parallel through the lead-out conductor 21 provided at the connection-side coil end 19 a , forming the armature winding 14 .
  • Seven upper coil pieces 15 a and 15 b in each of the first and third parallel circuits are located at the 1st, 4th, 6th, 8th, 9th, 11th and 14th positions from a pole center Pa (Pb), and seven lower coil pieces 16 a and 16 b in each of the first and third parallel circuits are located at the 2nd, 4th, 5th, 7th, 9th, 12th and 14th positions from a pole center Pa (Pb).
  • Seven upper coil pieces 15 in each of the second and fourth parallel circuits are located at the 2nd, 3rd, 5th, 7th, 10th, 12th and 13th positions from a pole center Pa (Pb), and the lower coil pieces 16 are located at the 1st, 3rd, 6th, 8th, 10th, 11th and 13th positions from a pole center Pa (Pb).
  • the circuits of the upper coil pieces 15 a in the first phase belt 17 are numbered 1, 2, 2, 1, 2, 1, 2, 1, 2, 1, 2, 2 and 1 sequentially from a pole center Pa
  • the circuits of the lower coil pieces 16 a are numbered 2, 1, 2, 1, 1, 2, 1, 2, 1, 2, 2, 1, 2 and 1 sequentially from a pole center Pa
  • the circuits of the upper coil pieces 15 b in the second phase belt 18 are numbered 3, 4, 4, 3, 4, 3, 4, 3, 4, 3, 4, 4, 4 and 3 sequentially from a pole center Pb
  • the circuits of the lower coil pieces 16 b are numbered 4, 3, 4, 3, 3, 4, 3, 4, 3, 4, 3, 4, 4, 4, 4, 3, 4 and 3 sequentially from a pole center Pb.
  • Table 5 shows the balance among the voltages generated in the armature winding according to the second embodiment of the invention.
  • Table 5 shows the case that a coil pitch is 35/42 (83.33%).
  • a voltage deviation (deviation from 1.0 of the p. u. voltage) is 0.14% maximum, and a phase angle deviation is 0.04°, which are lower than the values in the Taylor patent, but satisfy the reference voltage deviation of 0.4% and reference phase angle deviation of 0.15° or lower in the Habermann patent.
  • Table 6 shows the maximum values of voltage deviation and phase angle deviation changed by a coil pitch in the second embodiment of the invention.
  • the balance within a practical coil pitch range satisfies the reference voltage deviation of 0.4% and reference phase angle deviation of 0.15° or lower in the Habermann patent.
  • the jumper wires 20 b are provided only on the counter-connection side as in the first embodiment, and do not interfere with the lead-out conductor 21 . This improves the workability of connecting the jumper wires 20 b , ensures the insulation and fixing strength of the connection part without difficulty, and provides a reliable armature winding, as in the first embodiment.
  • the embodiment is not limited to the configuration shown in the drawing. The same effect can be obtained also by changing the lead-out position, and replacing the coil pieces placed at the electrically equivalent positions in the parallel circuits 1 and 3 .
  • FIG. 3 is a developed perspective view showing one phase of an armature winding of a rotating electrical machine according to a third embodiment of the invention.
  • An armature 11 has 84 slots 13 in an armature core 12 consisting of a laminated core.
  • a two-pole three-phase armature winding 14 having four parallel circuits is housed in two layers in the slots 13 .
  • the armature winding 14 of each phase has upper coil pieces 15 ( 15 a , 15 b ) housed in the upper part of the slots 13 , and lower coil pieces 16 ( 16 a , 16 b ) housed in the lower part of the slots 13 .
  • the end portions of these upper and lower coil pieces 15 and 16 are connected in series at a connection-side coil end 19 a that is connected to a winding lead-out portion, and at a counter-connection side coil end 19 b that is opposite to the connection-side coil end in the axial direction and not connected to a winding lead-out portion.
  • the armature winding 14 also has a first phase belt 17 which houses the upper and lower coil pieces 15 a and 16 a in fourteen slots 13 provided in the armature core 12 , and a second phase belt 18 which houses the upper and lower coil pieces 15 b and 16 b in fourteen slots 13 .
  • the armature winding 14 of each phase has four parallel circuits.
  • the parallel circuits are identified by parenthetic numbers 1 , 2 , 3 and 4 as shown in the drawing.
  • the upper coil pieces 15 in each of the phase belts 17 and 18 are connected to the corresponding lower coil pieces 16 separated by a fixed coil pitch, at the connection-side coil end 19 a and counter-connection side coil end 19 b , thereby forming four parallel circuits 1 , 2 , 3 and 4 .
  • the parallel circuits 1 , 2 , 3 and 4 are connected in parallel through the lead-out conductor 21 provided at the connection-side coil end 19 a , forming the armature winding 14 .
  • Seven upper coil pieces 15 a and 15 b in each of the first and third parallel circuits are located at the 1st, 4th, 6th, 8th, 9th, 11th and 14th positions from a pole center Pa (Pb), and the lower coil pieces 16 a and 16 b are located at the 1st, 4th, 6th, 7th, 9th, 12th and 14th positions from a pole center Pa (Pb).
  • Seven upper coil pieces 15 a and 15 b in each of the second and fourth parallel circuits are located at the 2nd, 3rd, 5th, 7th, 10th, 12th and 13th positions from a pole center Pa (Pb), and the lower coil pieces 16 a and 16 b are located at the 2nd, 3rd, 5th, 8th, 10th, 11th and 13th positions from a pole center Pa (Pb).
  • the circuits of the upper coil pieces 15 a in the first phase belt 17 are connected so that they are numbered 1, 2, 2, 1, 2, 1, 2, 1, 2, 1, 2, 2 and 1 sequentially from a pole center Pa
  • the circuits of the lower coil pieces 16 a are connected so that they are numbered 1, 2, 2, 1, 2, 1, 1, 2, 1, 2, 2, 1, 2 and 1 sequentially from a pole center Pa.
  • the circuits of the upper coil pieces 15 b in the second phase belt 18 are numbered 3, 4, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 4, 4, and 3 sequentially from a pole center Pb
  • the circuits of the lower coil pieces 16 b are numbered 3, 4, 4, 3, 4, 3, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 4, 4, and 3 sequentially from a pole center Pb.
  • Table 8 shows the balance among the voltages generated in the armature winding according to the third embodiment of the invention.
  • Table 8 shows the case that a coil pitch is 35/42 (83.33%).
  • a voltage deviation (deviation from 1.0 of the p. u. voltage) is 0.01% maximum, and a phase angle deviation is 0.01°, which are higher than the values in the first and second embodiments, and satisfy the reference voltage deviation of 0.4% and reference phase angle deviation of 0.15° or lower in the Habermann patent.
  • Table 9 shows the maximum values of voltage deviation and phase angle deviation changed by a coil pitch in the third embodiment of the invention.
  • the balance within a practical coil pitch range is higher than the values in the first and second embodiments, and satisfies the reference voltage deviation of 0.4% and reference phase angle deviation of 0.15° or lower in the Habermann patent.
  • the balance higher than the reference values in the Payer patent can be realized with respect to the voltages in parallel circuits, and a circulating current can be decreased. Therefore, it is possible to provide a reliable armature winding by decreasing a temperature increase in an armature winding.
  • the distance between the jumper wires 20 a and 20 b is increased to larger than the values in the first end second embodiments. This improves the workability of connecting the jumper wires, and ensures the fixing strength without difficult, thereby providing a reliable armature winding.
  • Seven upper coil pieces 15 in each of the second and fourth parallel circuits are located at the 2nd, 3rd, 5th, 7th, 10th, 12th and 13th positions from a pole center Pa (Pb), and the lower coil pieces 16 are located at the 2nd, 3rd, 5th, 8th, 10th, 11th and 13th positions from a pole center Pa (Pb).
  • two jumper wires per phase belt out of the jumper wires 20 b are provided at the connection-side coil end 19 a , causing interference with the lead-out conductor 21 , and the connection work becomes difficult.
  • the jumper wires 20 b are provided only at the counter-connection side coil end 19 b , causing no interference with the lead-out conductor 21 . This improves the workability of connecting the jumper wires 20 b , ensures the insulation and fixing strength of the connection part without difficulty, and provides a reliable armature winding.
  • connection part of the lead-out conductor 21 can be arranged inside the first and second phase belts 17 and 18 , not in a part adjacent to the first and second phase belts 17 and 18 and not-shown phase belts of other phases, a potential difference between the adjacent coil pieces of the connection part of the lead-out conductor 21 can be decreased, and reliability of insulation in the connection part of the lead-out conductor 21 can be increased.
  • FIG. 5 is a developed perspective view showing one phase of an armature winding of a rotating electrical machine according to a fourth embodiment of the invention. An explanation of the same part of configuration as in FIG. 1 is omitted, and only a difference part of configuration is described.
  • connection-side coil end 19 a and counter-connection side coil end 19 b of the first and second phase belts 17 and 18 when the relative positions of the upper and lower coil pieces 15 and 16 in the phase belts are indicated by the positions from a pole center Pa (Pb), the upper coil pieces 15 and lower coil pieces 16 of each parallel circuit are located at the positions shown in Table 10.
  • seven upper coil pieces 15 in each of the first and third parallel circuits are located at the 2nd, 3rd, 5th, 7th, 10th, 12th and 14th positions from a pole center Pa (Pb), and the lower coil pieces 16 are located at the 1st, 3rd, 6th, 8th, 10th, 12th and 13th positions from a pole center.
  • Seven upper coil pieces 15 in each of the second and fourth parallel circuits are located at the 1st, 4th, 6th, 8th, 9th, 11th and 13th positions from a pole center Pa (Pb)
  • the lower coil pieces 16 are located at the 2nd, 4th, 5th, 7th, 9th, 11th and 14th positions from a pole center Pa (Pb).
  • the circuits of the upper coil pieces 15 a in the first phase belt 17 are connected so that they are numbered 2, 1, 1, 2, 1, 2, 1, 2, 2, 1, 2, 1, 2 and 1 sequentially from a pole center Pa
  • the circuits of the lower coil pieces 16 a are connected so that they are numbered 1, 2, 1, 2, 2, 1, 2, 1, 2, 1, 2, 1, 1 and 2 sequentially from a pole center Pa.
  • the circuits of the upper coil pieces 15 b in the second phase belt 18 are numbered 4, 3, 3, 4, 3, 4, 3, 4, 4, 4, 3, 4, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4 and 3 sequentially from a pole center Pb
  • the circuits of the lower coil pieces 16 b are numbered 3, 4, 3, 4, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, and 4 sequentially from a pole center Pb.
  • Table 11 shows the balance among the voltages generated in the armature winding according to the third embodiment of the invention.
  • Table 11 shows the case that a coil pitch is 35/42 (83.33%).
  • a voltage deviation (deviation from 1.0 of the p. u. voltage) is 0.26% maximum, and a phase angle deviation is 0.05°, which are lower than the values in the first to third embodiments, but satisfy the reference voltage deviation of 0.4% and reference phase angle deviation of 0.15° or lower in the Habermann patent.
  • Table 12 shows the maximum values of voltage deviation and phase angle deviation changed by a coil pitch in the fourth embodiment of the invention.
  • the balance within a practical coil pitch range is lower than the values in the first to third embodiments, but satisfies the reference voltage deviation of 0.4% and reference phase angle deviation of 0.15° or lower in the Habermann patent.
  • the balance satisfying the reference value in the Harbermann patent can be realized for the voltages in each parallel circuit, and a circulating current can be decreased.
  • the number of the jumper wires 20 a and 20 b is decreased to four wires per phase, compared in the first to third embodiments, and the jumper wires 20 a and 20 b are separately provided at the connection-side coil end 19 a and counter-connection side coil end 19 b , increasing the distance between the jumper wires 20 a and 20 b .
  • This improves the workability of connecting the jumper wires, and ensures the fixing strength without difficult, thereby providing a reliable armature winding.
  • the number of man-hours required for providing jumper wires is of course decreased.
  • the length of two per phase out of the jumper wires 20 b is increased, but the total number six per phase is the same as in the third embodiment.
  • two jumper wires per phase belt out of the jumper wires 20 b are provided at the connection-side coil end 19 a , causing interference with the lead-out conductor 21 , and the connection work becomes difficult.
  • the jumper wires 20 b are provided only at the counter-connection side coil end 19 b , causing no interference with the lead-out conductor 21 . This improves the workability of connecting the jumper wires 20 b , ensures the insulation and fixing strength of the connection part without difficulty, and provides a reliable armature winding.
  • connection part of the lead-out conductor 21 can be arranged inside the first and second phase belts 17 and 18 , not in a part adjacent to the first and second phase belts 17 and 18 and not-shown phase belts of other phases, a potential difference between the adjacent coil pieces of the connection part of the lead-out conductor 21 , and reliability of insulation in the connection part of the lead-out conductor 21 can be increased.
  • an armature having an armature winding with four parallel circuits applied to a rotating electrical machine having 84 three-phase two-pole slots, in which a voltage imbalance among parallel circuits is decreased, and a circulating current loss among parallel circuits is decreased, and a jumper wire connection work in forming an armature winding is decreased, insulation and fixing strength of jumper wires are easily ensured.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)
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US10193406B2 (en) 2015-12-11 2019-01-29 Mitsubishi Hitachi Power Systems, Ltd. Rotating machinery
US11018542B2 (en) * 2018-08-28 2021-05-25 Mitsubishi Power, Ltd. Rotating machinery with three-phase armature windings and first and second parallel windings

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JP5231950B2 (ja) * 2008-11-13 2013-07-10 株式会社東芝 回転電機の電機子巻線
US9444296B2 (en) 2012-04-19 2016-09-13 Mitsubishi Electric Corporation Stator winding of electrical rotating machine
CN103564959A (zh) * 2012-08-10 2014-02-12 万翠娥 一种可发光的药物保健鞋
JP5923215B2 (ja) * 2013-02-28 2016-05-24 株式会社日立製作所 回転機及び回転機ドライブシステム
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JP6615685B2 (ja) * 2016-04-26 2019-12-04 株式会社東芝 回転電機の電機子巻線
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US20070182267A1 (en) 2006-02-03 2007-08-09 Kirk Neet Dynamoelectric machine having reduced magnetic noise and method
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US10193406B2 (en) 2015-12-11 2019-01-29 Mitsubishi Hitachi Power Systems, Ltd. Rotating machinery
US11018542B2 (en) * 2018-08-28 2021-05-25 Mitsubishi Power, Ltd. Rotating machinery with three-phase armature windings and first and second parallel windings

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PL2093862T3 (pl) 2016-03-31
JP5060325B2 (ja) 2012-10-31
JP2009183102A (ja) 2009-08-13
EP2093862B1 (en) 2015-10-07
CN101499685B (zh) 2011-08-17
CN101499685A (zh) 2009-08-05
EP2093862A2 (en) 2009-08-26
EP2093862A3 (en) 2009-09-02

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